Telegraph Key

<< >>
Description (Brief)
Telegraph keys are electrical on-off switches used to send messages in Morse code. The message travels as a series of electrical pulses through a wire. The operator pushes the key’s lever down briefly to make a short signal, a dot, or holds the lever down for a moment to make a slightly longer signal, a dash. The sequence of dots and dashes represent letters and numbers. This key has a switch on the side called a circuit-closer that takes the key off-line when not in use.
Location
Currently not on view
date made
ca 1900
maker
Menominee Electric Co.
Physical Description
brass (overall material)
metal (overall material)
plastic (overall material)
Measurements
overall: 3 in x 3 in x 5 1/4 in; 7.62 cm x 7.62 cm x 13.335 cm
ID Number
EM.312604.02
catalog number
312604.02
accession number
312604
Credit Line
from C. H. McDonald, thought T. Boyle
See more items in
Work and Industry: Electricity
Communications
Telegraph Keys
Data Source
National Museum of American History, Kenneth E. Behring Center

Comments

Add a comment about this object